Crathco / Grindmaster 67710E User manual

Brand: Crathco / Grindmaster

Model: 67710E

Category: Coffee makers

Type: User manual

1104 Form # AM-320-02

American Metal Ware

Coffee Urn

Installation, Operation & Service Manual

For

Model 67710E

Electric Steam

Special Features

After completing installation and set-up, the

equipment owner should keep this manual for

future reference.

PRINTED IN USA

Grindmaster Corporation™

4003 Collins Lane

Louisville, Kentucky 40245 USA

(502) 425-4776

(800) 695-4500 (USA and Canada only)

(800) 568-5715 (technical service only)

FAX: (502) 425-4664

www.grindmaster.com

TABLE OF CONTENTS

Warning Labels.......................................2

Introduction.............................................3

About the 67710E Coffee Urn..................4

General Description.....................4

Features of This Model................4

Pre-Installation........................................5

Package Contents.......................5

Rough In Drawing....................................6

Installation...............................................7

Initial Considerations...................7

Complete the Hook Up................8

Initial Start Up..............................9

Operation..............................................10

Load the Coffee.........................10

Start the Brew............................10

After the Brew is Finished..........11

Adjustments..........................................12

Bypass Adjustment....................12

Thermostat Adjustment..............12

Timer Adjustment.......................13

Flow Rate Adjustment................13

Fill Rate Adjustment...................14

Cleaning................................................15

After Each Use...........................15

Each Day...................................15

Semi-Weekly..............................15

Wiring Diagram......................................16

American Metal Ware 67710E Coffee Urn Page 2

Introduction

Thank you for purchasing this American Metal Ware product. American Metal Ware has

been building beverage equipment since 1883. This product has been designed for the

quality and cost conscious restaurant operator in mind. Our metal craftsmen proudly build

each product with great attention to detail.

This manual has been prepared to compliment your equipment. Take a few minutes to

become familiar with the equipment before you start operation. Within, you will find

information on the set-up, operation, and maintenance of the equipment. This information

will help you use this equipment to produce the best possible beverage product.

The installation and setup instructions will help get the equipment running quickly. You will

also learn the functions of all controls. Follow the cleaning and maintenance instructions

to ensure a long life for your equipment and to preserve its attractive appearance. If this

product requires service or adjustment, see the Adjustment section of this manual. This

section will explain the safest and easiest procedures for finding and making adjustments.

A repair parts section will help you identify the parts you need.

Page 3 American Metal Ware 67710E Coffee Urn

About the 67710E Coffee Urn

General Description

This coffee urn has been engineered to suit the special needs of the prison environment.

This section highlights the characteristics and special features of the product.

The urn is a large capacity, high-speed, coffee brewing and holding unit. The body is

constructed of two walls of stainless steel with insulation between. Inside is a large

capacity water tank where the brew is heated. Two ten gallon liners fit into that tank. Each

liner has its own controls which start and stop the brew process with the push of a button.

A pump draws water from the tank and sprays it over the grounds which are placed above

the liners. Faucets on the front of the urn allow the dispense of coffee from each liner and

hot water from the tank. A control automatically refills the tank as water is drawn off. A

thermostat regulates the temperature by switching electric heating elements inside the tank.

Features of This Model

Safety and Security

• No parts removable by hand.

• No breakable parts.

• Minimization of screw fastened parts on exterior. All remaining screws are one way.

• Lockable covers over control compartment and brewing area. When locked, there is

no access to hot water or coffee except through faucet.

• Security faucets with wrench tight, metal bonnets and self closing handles.

• Insulated body stays cooler.

• Lock our brew controls.

• Drain handle located inside control enclosure.

• Flanged feet may be bolted to table.

Operation

• Fully automatic brew cycle with automatic air agitation.

• Adjustable timer, by-pass, sprayover rate, and thermostat.

• Sensors indicate coffee in liner - no gauge glass.

• Automatic Refill and Low-Water, Heater Cutoff.

• Stainless steel mesh coffee filter.

• High Speed Brewing - Brew in both liners simultaneously.

Maintenance

• All components are easily accessible in the side control enclosure.

• Replace most components without draining the urn.

• Durable, easy to clean, 304 stainless steel construction.

American Metal Ware 67710E Coffee Urn Page 4

Page 5 American Metal Ware 67710E Coffee Urn

Pre-Installation

Package Contents

This coffee brewer should be packed in a box on a wooden skid. Check to make sure the

box contains the following parts:

1) The Urn

2) Two stainless steel mesh brew baskets.

3) Three pad-locks and one set of three identical keys.

4) This instruction manual.

5) Two clamps for pump tubing - in the control enclosure.

6) Two sets of two keys to turn on brew controls.

The next page shows a rough-in drawing, number 094-004. Refer to this drawing for

information required for installation. The drawing shows the locations of the electric and

water inlets, and some important dimensions of the brewer.

American Metal Ware 67710E Coffee Urn Page 6

If you still need help, call our service department at (800) 568-5715 Ext. 3 or (502) 425-4776 (Monday through Friday, 8 am - 6 pm EST) or an authorized

service center in your area. Please have the model and serial numbers ready so that accurate information may be given.

Prio authorization must be obtained from Grindmaster Corporation’s Technical Services Department for all warranty claims.

Page 7 American Metal Ware 67710E Coffee Urn

Installation

Initial Considerations

Unpack the Urn

Remove the cardboard carton from around the urn. Be careful not to scratch the stainless

steel with any tools. Unwrap any plastic wrapped items. Open both liner covers and

remove materials inside the liners. Remove the control enclosure to expose electric

connections.

Select a sight for the urn

The Urn must be placed on a sturdy, leveled table. The table must have a tray to collect

liquid from the faucets. To set up initially and adjust later, the installer must have access to

the side of the urn where the controls are located. Be sure to allow for space in the sight

selection.

Water and Electric

The electric ratings are printed on the nameplate of the urn and on the rough-in drawing.

The urn must be connected to a branch circuit with its own shut-off.

A water line must be run to the connection location. The urn has a 3/8” NPT water inlet as

shown on the rough-in drawing. Use 3/8” OD copper tubing for the connection. For

especially long runs where pressure drop is likely to be a problem, use larger tubing. The

water line should have a shut-off valve near the urn. The water pressure at the urn should

be between 30 and 70 psig.

Softened water does not make good coffee. For best results, use cold tap water. Cold

water will require a recovery time between brews. You may connect hot water if it is

necessary to brew in both liners continuously. Chlorine and lime in water are the biggest

problems in the operation of coffee brewers. Be sure the water is free of chlorine which will

deteriorate the stainless steel. Filters may be purchased to help control lime. American

Metal Ware’s warranty does not cover water problems.

Place Urn

Position the urn on the table in its operating position. Level the urn front to back and left to

right. The height of the feet is adjustable for this purpose.

Complete the Hook Up

Water Hook-Up

The water connection is on the back of the urn’s control enclosure - see figure 1.

WARNING, ELECTRIC SHOCK HAZARD

INSTALLATION SHOULD BE PERFORMED BY QUALIFIED

SERVICE PERSONNEL ONLY.

American Metal Ware 67710E Coffee Urn Page 8

It is a 3/8 Female NPT connection.

See the rough-in drawing for details on

location. You may wish to install a

water line filter to inhibit lime deposits

especially if your area has particularly

hard water. Lime, which precipitates as

the water is heated, will eventually

build up inside the urn.

Electric Hook-Up

Before starting any work, be sure the

electric line has been turned off. Check

the nameplate on the urn for the elec-

tric ratings of the urn. A wiring diagram

is also provided inside the control

enclosure and in this manual. Use the

appropriate circuit breaker and cord for

the electric service that this urn that

requires. Secure the cord to the rear of

the control enclosure with the

appropriate cord grip bushing. The hole

for electric connection is located on the

rear of the urn’s control enclosure as

shown in figure 1 and on the rough-in

drawing.

Wire the cord to the terminal block and

the ground connection shown in figure

2. Be sure the connection is secure

and no strands touch adjacent wires.

Figure 1, Service Hookup Locations

Figure 2, Terminal Block

Electric Inlet

3/8” FPT

Water

Inlet

Page 9 American Metal Ware 67710E Coffee Urn

Initial Start Up

Now that the brewer is connected, it can be started and checked.

• Leave the access cover open.

• Turn on the water supply.

• Turn on the electricity to the urn.

The urn will now begin to fill. The heaters should still be off. When the water level is above

the heaters, the contactor will close to turn on the heaters.

Check for leaks in the water connection and inside the control enclosure. Assuming all is

working correctly, close the control enclosure and allow to finish filling. An indicator light

labeled FILLING is lit while the fill valve is open. When the light turns off, the urn is full.

The urn will take approximately 15 minutes to fill.

If cold water is used, the heat-up time is approximately 30 minutes depending on the

electric ratings of the urn. An indicator light labeled WATER HOT will turn on when the

heaters have shut off.

American Metal Ware 67710E Coffee Urn Page 10

Operation

Now that the urn has been installed and started up, it is ready for operations. This section

describes the brew process from start to finish. Before brewing the first batch of coffee,

follow the procedure outlined here to brew an initial batch of water only into each liner. This

will rinse the components and set the gaskets and seals.

Load the Coffee

•

Start the Brew

•

Remove the pad lock which secures the liner cover over the liner into which you want to

brew.

Lift the cover to expose the brew basket. Note that the brew basket has a mesh bottom

so filter paper is not required.

If there are used grounds in the basket, dispose of them and rinse the basket

Fill the brew basket with the proper

amount of ground coffee to brew

ten gallons. Pour the coffee directly

into the basket - do not use filter

paper. See the following section for

instructions on the amount and grind

of coffee.

Check the liner. The liner should be

empty and clean before brewing a

batch. If the liner is not empty, it

will overflow when brewing.

Place the brew basket over the liner

and close the lid. You may padlock

the lid at this time to prevent

tampering.

Turn the brew lock key to ON for

the liner you are brewing to.

Check the WATER HOT light to be

sure the water is up to temperature.

If the light is off, wait a few

moments for the urn to finish

heating.

Be certain to close the cover over

the liner you wish to use.

Press the START switch for the

liner you are brewing to.

Figure 3, Brew Controls

WATER HOT

FILLING

COFFEE IN LINER

BREW LOCK

BREW LIGHT

START

STOP

Page 11 American Metal Ware 67710E Coffee Urn

•

After the Brew is Finished

When the brew cycle has automatically shut off, you should have ten gallons of coffee. The

level will be higher in the liner if you brew with no grounds. If the level is not correct, see

the Adjustment section.

•

The pump will run for 12 1/2 minutes to spray over the water required for 10 gallons of

coffee. The BREW light stays on while the pump is running. As water in the tank is

used, it is refilled automatically. The FILL light indicates that the fill valve is open. The

light should alternate on and off, even when brewing to both sides. If the FILL light stays

on during the brew cycle, see the Adjustment section for instructions on speeding the

fill rate.

Press the STOP switch if you need to stop the brew. The timer will reset when STOP is

pressed, so be sure the liner is empty before you press START again.

Allow about two minutes for the grinds to stop dripping.

CAREFULLY open the liner cover.

Remove the brew basket, dispose of the used grounds, and rinse the basket.

Replace the basket on top of the liner and close the lid. The lid may be locked again.

Monitor the level of coffee by checking the flashing light labeled COFFEE IN LINER

WHEN LIT. If this light is flashing, the liner is almost empty.

American Metal Ware 67710E Coffee Urn Page 12

Adjustments

Bypass Adjustment

See figure 4.

Each liner has an independent bypass which is adjustable. The

Bypass valve controls the ratio of water sprayed over the

grounds to the water poured directly into the liner -bypassing the

grounds.

The urn is shipped from the factory with the bypass open

3 1/2 turns. This means approximately 25% of the water

bypasses the coffee grounds. See the next section on Brew Techniques about the effect of

bypass on coffee.

If you desire more of the water to go through the coffee grounds, close the valve. Open the

valve to allow more water to bypass the coffee. Each liner’s valve must be adjusted

separately. You may need to adjust the brew timer slightly if you adjust the bypass to

maintain the correct volume.

Thermostat Adjustment

See figure 5.

The thermostat controls the temperature of the water

in the tank by switching the heater contactor on and off.

A capillary tube monitors temperature near the heaters.

The thermostat is calibrated such that when the shaft is

turned all the way on, the temperature is 200 degrees

Fahrenheit.

To change the water tank temperature:

•

WARNING, ELECTRIC SHOCK HAZARD

INSTALLATION SHOULD BE PERFORMED BY QUALIFIED

SERVICE PERSONNEL ONLY.

Turn off power to the urn.

Remove the control enclosure access cover.

Locate the thermostat shaft inside the control

enclosure.

Turn the shaft full on.

Figure 5, Thermostat

Figure 4, Bypass Valve

Adjustment

Screw

Page 13 American Metal Ware 67710E Coffee Urn

To Change the Water Tank Temperature (cont)

•

Timer Adjustment

See figure 6.

Two timers control the brew cycle including the air agitation.

When a start switch is pressed, the timer sends power to the

pump through the normally open contact. Also, the brew

light is turned on. These stay on for the set amount of time.

After the time is up, the air agitation turns on to stir the

coffee.

The time is set by turning an adjustment potentiometer,

see figure 6. This potentiometer is factory set to spray for 12 1/2 minutes.

To Adjust the Timer:

•

Flow Rate Adjustment

See figure 7.

Two valves - one for each liner - control the flow rate of water

from the pump to the sprayover. They have been factory set to

provide proper rate for a twelve minute brew time. Only adjust

these if the rate has obviously come out of adjustment.

To Adjust the Rate:

•

Figure 7, Flow Valve

Figure 6, Brew Timer

Spray Over Rate

Control

Timer

Adjust

Insert a miniature, flat screwdriver into the center of the shaft.

Turn the screw slightly to make adjustments: clockwise to increase the

temperature, counterclockwise to lower.

Turn the power back on and allow the temperature to equalize. The water

hot light turns on when the heaters are off.

Check the water temperature inside the tank. Repeat adjustment if needed.

Turn off power to the urn.

Remove the control enclosure access cover.

Locate the timer you need to adjust.

Find the marked adjustment potentiometer on the front of the timer.

Insert a screwdriver and turn the potentiometer to the approximate time you need.

Restart the brewer and measure the time of a brew - start button pressed to

sprayover stop.

Re-adjust the potentiometer to make fine corrections if needed.

Turn off all power to the urn.

Remove the control enclosure access cover.

Locate the valve to the liner you want to adjust.

Open the valve slightly for faster sprayover, close

for slower sprayover.

Turn the urn back on and wait for the water hot light to turn on.

Brew water into the liner for the standard 12 1/2 minutes. Adjust the

timer if it does not run the pump for the correct time.

American Metal Ware 67710E Coffee Urn Page 14

To adjust the rate (cont)

•

Fill Rate Adjustment

The fill rate depends on the water line pressure and the

opening of the FAST FILL VALVE, see figure 8. If the urn

does not refill as fast as it uses water during a brew cycle, you

may adjust the fill rate. If you adjust for maximum fill rate and

the level still cannot keep up, either the pressure is too low or

the fill system may have a clog. See Troubleshooting.

To Adjust the Fill Rate:

•

Figure 8, Fill Rate Valve

The level in the liner should be one inch below the line where the

liner ring attaches to the liner wall.

Re-adjust until the level is correct.

Remove the control access cover.

Locate the needle valve labeled, FAST FILL VALVE.

Open the valve a few turns.

Brew water into both liners simultaneously. Watch the

FILLING indicator.

If the light cycles on and off, the rate is fast enough.

If the FILLING light stays on, the rate is too slow. Re-adjust.

Page 15 American Metal Ware 67710E Coffee Urn

Cleaning

Cleaning your coffee brewer will help the machine last longer, produce better coffee, and

keep its attractive appearance. Cleaning regularly does not take much time. Follow these

steps for daily and weekly cleaning. Cleaning brushes may be purchased from American

Metal Ware or your restaurant equipment dealer. Do not use soap, scouring powders, or

abrasive materials to clean your equipment. These will damage the stainless steel finish.

After Each Use

•

Each Day

•

Semi-Weekly

•

Empty and rinse brew basket.

Drain and rinse urn liner.

Add some hot water to liner and brush liner interior. To add small amounts of hot

water to liner, close cover and press start and stop switches to control amount.

Rinse again and urn is ready for next brew.

Brush urn liner well, rinse well.

Wipe exterior surfaces with a damp rag. The stainless steel may be cleaned with

stainless steel cleaner.

After the last use and cleaning, fill brew water into the liners to help any coffee oils

from staining the metal.

Clean the liners with urn cleaner, never use bleach or chlorine based products on

stainless steel.

Fill the liner 3/4 with hot water. Follow the cleaner’s instructions and allow to stand

in hot urn for 30 minutes.

Coffee brewer cleaners which have been used successfully:

DIP-IT from Economics Laboratory, White Plaines, NY

OXYLITE from Avril, Inc., Syndet Division, Reading, PA

TEMP-KLEEN from Caddy Corp. of America, Pitman, NJ

Scrub inside the liner with a long handled brush. Clean the nut in the bottom

of the liner.

Be sure the liner is empty. Remove the bonnet, or the cap and handle part, of the

coffee faucets. Brush inside of the faucet body. Clean the silicone faucet seal.

Also, with the liners empty, remove the coffee faucets from their shanks. Brush

clean the tube interior which leads to the center of the liners.

American Metal Ware 67710E Coffee Urn Page 16

Page 17 American Metal Ware 67710E Coffee Urn

American Metal Ware 67710E Page 18

Notes

Grindmaster® Coffee Grinders and Brewers • Espressimo® Espresso Machines • Crathco® Hot Beverage Dispensers

Crathco® Cold and Frozen Beverage Dispensers • American MetalWare® Coffee and Tea Systems

Tel (502) 425-4776 • Fax (502) 425-4664 • 1-800-695-4500

P.O. Box 35020 • Louisville, KY 40232 • USA

www.grindmaster.com • email: [email protected]

Crathco / Grindmaster 67710E User manual

Brand: Crathco / Grindmaster

Model: 67710E

Category: Coffee makers

Type: User manual

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Crathco / Grindmaster 67710E User manual

Crathco / Grindmaster 67710E User manual

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